Unmanned aerial vehicles (UAVs) with flying wing designs offer unique advantages in terms of maneuverability and fuel efficiency, but achieving precise control over these tailless aircraft can be challenging. This study investigates the potential of notch leading edge (NLG) technology to improve the effectiveness of control surfaces in flying wing UAVs. NLG refers to a design feature where notches or depressions are strategically incorporated along the leading edge of the wings. This seemingly minor modification can significantly impact the aircraft′s aerodynamic performance and controllability. The present research leverages numerical methods to meticulously examine the influence of NLG placement on a crucial parameter: the roll torque coefficient. This coefficient quantifies the effectiveness of control surfaces, such as split drag rudder, in yawing moments, essential for maneuvering the aircraft. The investigation adopts a parametric approach, meticulously varying the dimensions and positions of the NLG along the wing span. This comprehensive analysis reveals a fascinating relationship between NLG placement and control surface efficacy. The study convincingly demonstrates that positioning the NLG closer to the wing root, where the wing meets the fuselage, yields superior results compared to placements near the wingtip.
Esfandabadi et al. (Thu,) studied this question.